<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>Document</title>
        <script src="./Promise.js"></script>
    </head>
    <body>
        <script>
            let p = new Promise((resolve, reject) => {
                resolve('ok');
                // reject('Error');
            });

            //catch 方法调用   undefined 
            // let res = p.catch(r => {
            //     console.log(r);
            // });
            
            //值传递
            p
            .then()
            .then(v => {
                console.log(v);
            }).catch(r => {
                console.log(r);
            }) 

            //异常穿透 
            // p.then(
            //     v => {
            //         console.log(v);
            //     }
            // ).catch(r => {
            //     console.log(r);
            // })

            

            
        </script>
    </body>
</html>
